Electric soldering-iron.



E. E. ROSE. v ELECTRIC SOLDERING IRON,

APPLICATION IILED APR. 10. 1911. 5

Patented 001;. 14, 1913.

IN NTOR M u ATTORNEY all I 2 rivil ni Soldering-Irons, of which ing member or holder 1, a reducing bush ing 2, a heater unit 3, l I a soldering tip 5, a tubular shaft 6 and an EDWARD E. ROSE, OF PITTSBURGH, PENNSYLVANIA, ASSIGNOR TO WESTI NGITOUSE ELECTRIC AND MANUFACTURING COMPANY, A CORPORATION OF PENNSYLVANIA.

ELECTRIC SOLDERINGJRON.

Specification of Letters Patent.

Application filed April 10, 1911. Serial No. 620,174.

To all whom it may concern:

Be it known that I, EDWARD E. Rose, a citizen of the United States, and a resident of Pittsburgh, in the county of Allegheny and State of Pennsylvania, have invented a new and useful Improvement in Electric the following is a specification.

My invention relates to electric soldering irons, and it has for its object to provide a device of this character which shall be simple and durable in operation, and that shall embody means whereby the heat generated in its heater unit may be efliciently conducted and imparted to a removable soldering tip.

My invention may reference to the accompanying drawing, in which Figure 1 is'a view, partially in section and partially in side elevation, of a device constructed in accordance with my invention. Fig. 2 is a detail view of the heater shown in Fig. 1, in a preliminary stage of its construction. Figs. 3 and 4 are, respectively, a side elevation and an end viewof the heater shown in Fig. 1, and Figs. 5, (3 and 7 are detail views of the reducing bushing shown in Fig.1. 7

Referring to the accompanying drawing, the device here shown comprises a receiva tapered s eeve 4,

insulating handle 7 The receiving member 1 is substantially tubular in form and is tapered slightly toward its inner end to receive the heater unit as will be hereinafter set forth. The reducing bushing 2 comprises a body portion 8 and a neck portion 9. The body portion 8 is provided with a large centrallylocated recess 10 and longitudmally-disposed slots or key-ways 11 which similar slots the receiving member 1 12' n for a purpose to be hereinafter described.

The inner end of the receiving member 1 fits tightly into the recess 10 in the reducing bushing 2, said members being rigidly secured to ether by a fusing or welding proccss or ot erwise.

One end of the tubular shaft member 6 fits within the neck portion 9 of the reducing member 2 and is rigidly secured thereto in a suitable manner,

in construction and effectivebest be understood by register with while the other end of the tubular shaft is provided with the insulating handle 7 which envelops a suitable terminal member (not shown) to which the external connections to a multi-conductor service cable 13 are made in the usual manner.

The heater unit .3 is substantially tubular in form and may be of any suitable construction, although I prefer a unit which comprises a plurality of rows of resistance wire 14 of the zigzag type which is disposed between layers of insulating material 15 and suitable sheet metal plates 16. Having assembled the component parts of-the heater unit as described, they are subjected to a-considerable pressure, and the outer edges of the plates 16 are fused or welded together in a well-known manner, thereby providing a self-contained and durable unit.

Furthermore, each side plate 16 is pro- Patented Oct, 14, 1913.

vided with a relatively narrow projecting ortion 17, in order to form a protecting sheath 18 for a plurality of heater unit leads 19. After the heater unit 3 is in the form shown in Fig. 2, it is fashioned into its final tubular form, as shown in Figs. 1, 3 ahd l.

The sleeve member 4 is of good heat-conducting material and is disposed within the heater unit 3, the outer surface thereof being tapered slightly toward its inner" end to conform to the taper of the outer receiving member 1. The outer end of the sleeve member 4 is provided with an enlarged portion 20 which abuts against the end of the heater unit 3 and is fitted tightly within the outer end of the receiving member 1. The inner portion of the tapered sleeve member 4 is provided with a centrally-located cylindrical recess 22, while they outer portion thereof embodies a relatively large and tapered recess 23 wliich communicates with the recess 22 and is adapted to receive the soldering tip 5. p

The soldering tip 5 comprises a working portion 24 and a shank or body portion 25 which is tapered toward its inner end to correspond to the taper of the recess 23. The inner end of the shank portion 25 is provided with an extension or rod 26 that projects through the cylindrical recess 22 into cooperative relationship with the slotor key-way 11.

In assembling the working elements 3, 4 and 5, the heater unit 3 is first inserted into the tapered receiving member 1, after which upon the soldering tip probably be thin heater unit constituting a lining for said recess, a tubular member located within said heater ing a tapered interior, and a soldering tip the tapered sleeve member 4 is driven into position, thereby securely fastening the heater 3 and producing a considerable pressure thereon, as Well as effecting an intimate contact therewith, as will be readily under frictionally held in said interior. I stood. The protected heater unit leads l9 3. In an electric soldering iron, the comare suitably insulated from each other and bination with a supporting member having are conducted through the reducing busha tapered receiving chamber, and a tubular ing 2 and the tubular shaft 6 to the terminal heater unit fitted therein, of a tapered sleeve member (not shown) to which they are conof good conducting material located within nected.

said heater and making intimate contact In most cases, it is rarely necessary to retherewi'th, and a removable soldering tip move the heater unit 3 and it may be found frictionally secured within said tapered preferable to permanently secure the sleeve sleeve. member 4 in position by fusing or welding 4:, In a soldering iron, the combination its outer end 20 to the receiving member 1. With a tapered receptacle, a tubular heater By so doing, the acid fumes which are indisposed therein, and a tapered sleeve memcident to a soldering process are excluded ber located within said heater and exerting from the heater unit 3 and the usual conpressure thereon, .of a removable plug tip sequent deterioration is prevented. The solhaving a greater taper than said sleeve memdering tip 5 may then be forced into posiher and frictionally held Within said sleeve tion, the projecting rod 26 thereof extcndmember. mg into cooperative relationship with the 5. In an electric soldering iron, the comslot or key way 1]. so that the tip 5 may be bination with a supporting member having readily removed by the insertion of a suita tapered receiving chamb' able wedge or key (not shown) into the key-way ll.

verse key-Way cased heater unit disposed in said chamber In some classes of work, it is desirable to change the size of soldering tips at freas a lining therefor, and a tapered sleeve member fitted within said heater unit to quent intervals, and, therefore, it becomes expedient to provide a considerable taper effect a considerable pressure thereon, said sleeve member being permanently secured to '5 andits coiiperasaid supporting member and provided with two recess 23, in order that the tip may be readily released and withdrawn. Inasmuch as frequent removals of the soldering tip are liable to cause the end of the rod 26 to become mutilated and battered, it will found desirable to construct the do not wish to be dering tip frictionally held in said recess and having a portion whichprojects through said. recess into coiiperative relationship with said transverse key-way.

6. A soldering iron comprising a tapered receiving member having a transverse keyway therethrough, a tubular heater disposed therein, a tapered sleeve member located within said heater and having a centrally disposed recess of greater taper than the same of steel, although I restricted in this respect.

Such modifications in the structural details and in the arrangement and location of parts as may be made by those skilled in the art without materially changing the mode of operation or the result are to be understood as included Within the spirit and scope of my invention.

I claim as my invention:

1. An electric soldering iron comprising a receptacle, a heater unit disposed therein as a linin r a tubular member for securing said heater unit in position and maintaining a pressure thereon, and a removable soldering tip having a tapered end seated in a correspondingly tapered socket in said tubular member and frictionally held therein.

2. An electric soldering iron comprising a holder having a tapered recess therein, a

ing a taper to conform to that of said recess and held frictionally therein, and a shank or rod of relatively hard material projecting from said soldering tip through said sleeve member into cooperative relationship with the said transverse key-way.

In testimony whereof, I- have hereunto subscribed my name this 30th day of March, 1911.,

EDWARD E. ROSE.

Witnesses:

RUDOLPH A. Bonzn, B. B. H nes.

M p Copies of this patent may be obtained for five cents each, by addressing the Commissioner of {Patent v Washington, D. 0.

unit under compression and haver"'and a transat the base thereof, a thin 1na centrally disposed tapered recess, of a solouter aortion thereof a soldcrin tia hav- 

